Large electric field induced strain in a new lead-free ternary Na0.5Bi0.5TiO3-SrTiO3-BaTiO3 solid solution
Large electric field induced strain in a new lead-free ternary Na0.5Bi0.5TiO3-SrTiO3-BaTiO3 solid solution
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DOI：
10.1016/j.matlet.2016.08.076
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发表时间：
2016-12
影响因子：
3
通讯作者：
S. Praharaj;D. Rout;Seong-Hoon Kang;I. W. Kim
中科院分区：
文献类型：
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作者：
S. Praharaj;D. Rout;Seong-Hoon Kang;I. W. Kim
采用固相反应法制备的（0. 8-x）NBT-0.2ST-xBT无铅三元体系，其结构由准立方（x≤ 0. 04）向四方（x≥ 0. 06）沿着变化，在0. 04 ≤x≤ 0. 06之间可能存在相共存。当x=0.04时，该固溶体的最佳介电常数ε max为2670，具有很强的弛豫行为，扩散系数接近2，P-E环很窄，最佳应变值Smax为0.424%，归一化压电常数d33* 为688 pm/V。ST为基础的三元系统在寻找一个潜在的无铅压电材料。
The new lead-free ternary system (0.8-x)NBT-0.2ST-xBT prepared by solid state reaction with 100%perovskite phase, undergoes a structural change from pseudo-cubic (x≤0.04)to tetragonal (x≥0.06)along with a possible phase coexistence between 0.04≤x≤0.06. At x=0.04, the solid solution exhibits an optimum dielectric constant εmaxof 2670, a strong relaxor behavior with a high diffuseness coefficient close to 2evidenced by slim P-E loops, excellent piezoelectric properties such as optimum strain value Smax of 0.424%and a normalized piezoelectric constant d33*of 688 pm/V. The above encouraging results may be helpful for further investigations of NBT-ST based ternary systems in search of a potential Pb-free piezoelectric material.